diff options
| author | Paul E. McKenney <paulmck@linux.vnet.ibm.com> | 2017-05-10 15:57:16 -0700 |
|---|---|---|
| committer | Paul E. McKenney <paulmck@linux.vnet.ibm.com> | 2017-06-08 18:52:39 -0700 |
| commit | f7a10a975036ef9ca957bfe12ab2d4b1a46cccd1 (patch) | |
| tree | e871d763558ebc957577144fec2e65c800e2737d /init | |
| parent | 90040c9e3015054db7efa0101afdd446d1167fe8 (diff) | |
rcu: Remove the RCU_KTHREAD_PRIO Kconfig option
Anything that can be done with the RCU_KTHREAD_PRIO Kconfig option can
also be done with the rcutree.kthread_prio kernel boot parameter.
This commit therefore removes this Kconfig option.
Reported-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Rik van Riel <riel@redhat.com>
Diffstat (limited to 'init')
| -rw-r--r-- | init/Kconfig | 31 |
1 files changed, 0 insertions, 31 deletions
diff --git a/init/Kconfig b/init/Kconfig index a2cfde19e8b8..6f257d51f582 100644 --- a/init/Kconfig +++ b/init/Kconfig @@ -697,37 +697,6 @@ config RCU_BOOST Say Y here if you are working with real-time apps or heavy loads Say N here if you are unsure. -config RCU_KTHREAD_PRIO - int "Real-time priority to use for RCU worker threads" - range 1 99 if RCU_BOOST - range 0 99 if !RCU_BOOST - default 1 if RCU_BOOST - default 0 if !RCU_BOOST - depends on RCU_EXPERT - help - This option specifies the SCHED_FIFO priority value that will be - assigned to the rcuc/n and rcub/n threads and is also the value - used for RCU_BOOST (if enabled). If you are working with a - real-time application that has one or more CPU-bound threads - running at a real-time priority level, you should set - RCU_KTHREAD_PRIO to a priority higher than the highest-priority - real-time CPU-bound application thread. The default RCU_KTHREAD_PRIO - value of 1 is appropriate in the common case, which is real-time - applications that do not have any CPU-bound threads. - - Some real-time applications might not have a single real-time - thread that saturates a given CPU, but instead might have - multiple real-time threads that, taken together, fully utilize - that CPU. In this case, you should set RCU_KTHREAD_PRIO to - a priority higher than the lowest-priority thread that is - conspiring to prevent the CPU from running any non-real-time - tasks. For example, if one thread at priority 10 and another - thread at priority 5 are between themselves fully consuming - the CPU time on a given CPU, then RCU_KTHREAD_PRIO should be - set to priority 6 or higher. - - Specify the real-time priority, or take the default if unsure. - config RCU_BOOST_DELAY int "Milliseconds to delay boosting after RCU grace-period start" range 0 3000 |